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1 | d5970055 | Michael S. Tsirkin | /*
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2 | d5970055 | Michael S. Tsirkin | * vhost support
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3 | d5970055 | Michael S. Tsirkin | *
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4 | d5970055 | Michael S. Tsirkin | * Copyright Red Hat, Inc. 2010
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5 | d5970055 | Michael S. Tsirkin | *
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6 | d5970055 | Michael S. Tsirkin | * Authors:
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7 | d5970055 | Michael S. Tsirkin | * Michael S. Tsirkin <mst@redhat.com>
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8 | d5970055 | Michael S. Tsirkin | *
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9 | d5970055 | Michael S. Tsirkin | * This work is licensed under the terms of the GNU GPL, version 2. See
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10 | d5970055 | Michael S. Tsirkin | * the COPYING file in the top-level directory.
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11 | 6b620ca3 | Paolo Bonzini | *
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12 | 6b620ca3 | Paolo Bonzini | * Contributions after 2012-01-13 are licensed under the terms of the
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13 | 6b620ca3 | Paolo Bonzini | * GNU GPL, version 2 or (at your option) any later version.
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14 | d5970055 | Michael S. Tsirkin | */
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15 | d5970055 | Michael S. Tsirkin | |
16 | d5970055 | Michael S. Tsirkin | #include <sys/ioctl.h> |
17 | d5970055 | Michael S. Tsirkin | #include "vhost.h" |
18 | d5970055 | Michael S. Tsirkin | #include "hw/hw.h" |
19 | bf1b0071 | Blue Swirl | #include "range.h" |
20 | 11078ae3 | Marcelo Tosatti | #include <linux/vhost.h> |
21 | c49450b9 | Avi Kivity | #include "exec-memory.h" |
22 | d5970055 | Michael S. Tsirkin | |
23 | d5970055 | Michael S. Tsirkin | static void vhost_dev_sync_region(struct vhost_dev *dev, |
24 | 2817b260 | Avi Kivity | MemoryRegionSection *section, |
25 | d5970055 | Michael S. Tsirkin | uint64_t mfirst, uint64_t mlast, |
26 | d5970055 | Michael S. Tsirkin | uint64_t rfirst, uint64_t rlast) |
27 | d5970055 | Michael S. Tsirkin | { |
28 | d5970055 | Michael S. Tsirkin | uint64_t start = MAX(mfirst, rfirst); |
29 | d5970055 | Michael S. Tsirkin | uint64_t end = MIN(mlast, rlast); |
30 | d5970055 | Michael S. Tsirkin | vhost_log_chunk_t *from = dev->log + start / VHOST_LOG_CHUNK; |
31 | d5970055 | Michael S. Tsirkin | vhost_log_chunk_t *to = dev->log + end / VHOST_LOG_CHUNK + 1;
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32 | d5970055 | Michael S. Tsirkin | uint64_t addr = (start / VHOST_LOG_CHUNK) * VHOST_LOG_CHUNK; |
33 | d5970055 | Michael S. Tsirkin | |
34 | d5970055 | Michael S. Tsirkin | assert(end / VHOST_LOG_CHUNK < dev->log_size); |
35 | d5970055 | Michael S. Tsirkin | assert(start / VHOST_LOG_CHUNK < dev->log_size); |
36 | d5970055 | Michael S. Tsirkin | if (end < start) {
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37 | d5970055 | Michael S. Tsirkin | return;
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38 | d5970055 | Michael S. Tsirkin | } |
39 | d5970055 | Michael S. Tsirkin | for (;from < to; ++from) {
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40 | d5970055 | Michael S. Tsirkin | vhost_log_chunk_t log; |
41 | d5970055 | Michael S. Tsirkin | int bit;
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42 | d5970055 | Michael S. Tsirkin | /* We first check with non-atomic: much cheaper,
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43 | d5970055 | Michael S. Tsirkin | * and we expect non-dirty to be the common case. */
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44 | d5970055 | Michael S. Tsirkin | if (!*from) {
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45 | 0c600ce2 | Jason Wang | addr += VHOST_LOG_CHUNK; |
46 | d5970055 | Michael S. Tsirkin | continue;
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47 | d5970055 | Michael S. Tsirkin | } |
48 | d5970055 | Michael S. Tsirkin | /* Data must be read atomically. We don't really
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49 | d5970055 | Michael S. Tsirkin | * need the barrier semantics of __sync
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50 | d5970055 | Michael S. Tsirkin | * builtins, but it's easier to use them than
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51 | d5970055 | Michael S. Tsirkin | * roll our own. */
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52 | d5970055 | Michael S. Tsirkin | log = __sync_fetch_and_and(from, 0);
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53 | d5970055 | Michael S. Tsirkin | while ((bit = sizeof(log) > sizeof(int) ? |
54 | d5970055 | Michael S. Tsirkin | ffsll(log) : ffs(log))) { |
55 | 7b67b18a | Michael S. Tsirkin | ram_addr_t ram_addr; |
56 | d5970055 | Michael S. Tsirkin | bit -= 1;
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57 | 2817b260 | Avi Kivity | ram_addr = section->offset_within_region + bit * VHOST_LOG_PAGE; |
58 | fd4aa979 | Blue Swirl | memory_region_set_dirty(section->mr, ram_addr, VHOST_LOG_PAGE); |
59 | d5970055 | Michael S. Tsirkin | log &= ~(0x1ull << bit);
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60 | d5970055 | Michael S. Tsirkin | } |
61 | d5970055 | Michael S. Tsirkin | addr += VHOST_LOG_CHUNK; |
62 | d5970055 | Michael S. Tsirkin | } |
63 | d5970055 | Michael S. Tsirkin | } |
64 | d5970055 | Michael S. Tsirkin | |
65 | 04097f7c | Avi Kivity | static int vhost_sync_dirty_bitmap(struct vhost_dev *dev, |
66 | 2817b260 | Avi Kivity | MemoryRegionSection *section, |
67 | 04097f7c | Avi Kivity | target_phys_addr_t start_addr, |
68 | 04097f7c | Avi Kivity | target_phys_addr_t end_addr) |
69 | d5970055 | Michael S. Tsirkin | { |
70 | d5970055 | Michael S. Tsirkin | int i;
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71 | 04097f7c | Avi Kivity | |
72 | d5970055 | Michael S. Tsirkin | if (!dev->log_enabled || !dev->started) {
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73 | d5970055 | Michael S. Tsirkin | return 0; |
74 | d5970055 | Michael S. Tsirkin | } |
75 | d5970055 | Michael S. Tsirkin | for (i = 0; i < dev->mem->nregions; ++i) { |
76 | d5970055 | Michael S. Tsirkin | struct vhost_memory_region *reg = dev->mem->regions + i;
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77 | 2817b260 | Avi Kivity | vhost_dev_sync_region(dev, section, start_addr, end_addr, |
78 | d5970055 | Michael S. Tsirkin | reg->guest_phys_addr, |
79 | d5970055 | Michael S. Tsirkin | range_get_last(reg->guest_phys_addr, |
80 | d5970055 | Michael S. Tsirkin | reg->memory_size)); |
81 | d5970055 | Michael S. Tsirkin | } |
82 | d5970055 | Michael S. Tsirkin | for (i = 0; i < dev->nvqs; ++i) { |
83 | d5970055 | Michael S. Tsirkin | struct vhost_virtqueue *vq = dev->vqs + i;
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84 | 2817b260 | Avi Kivity | vhost_dev_sync_region(dev, section, start_addr, end_addr, vq->used_phys, |
85 | d5970055 | Michael S. Tsirkin | range_get_last(vq->used_phys, vq->used_size)); |
86 | d5970055 | Michael S. Tsirkin | } |
87 | d5970055 | Michael S. Tsirkin | return 0; |
88 | d5970055 | Michael S. Tsirkin | } |
89 | d5970055 | Michael S. Tsirkin | |
90 | 04097f7c | Avi Kivity | static void vhost_log_sync(MemoryListener *listener, |
91 | 04097f7c | Avi Kivity | MemoryRegionSection *section) |
92 | 04097f7c | Avi Kivity | { |
93 | 04097f7c | Avi Kivity | struct vhost_dev *dev = container_of(listener, struct vhost_dev, |
94 | 04097f7c | Avi Kivity | memory_listener); |
95 | 04097f7c | Avi Kivity | target_phys_addr_t start_addr = section->offset_within_address_space; |
96 | 04097f7c | Avi Kivity | target_phys_addr_t end_addr = start_addr + section->size; |
97 | 04097f7c | Avi Kivity | |
98 | 2817b260 | Avi Kivity | vhost_sync_dirty_bitmap(dev, section, start_addr, end_addr); |
99 | 04097f7c | Avi Kivity | } |
100 | 04097f7c | Avi Kivity | |
101 | d5970055 | Michael S. Tsirkin | /* Assign/unassign. Keep an unsorted array of non-overlapping
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102 | d5970055 | Michael S. Tsirkin | * memory regions in dev->mem. */
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103 | d5970055 | Michael S. Tsirkin | static void vhost_dev_unassign_memory(struct vhost_dev *dev, |
104 | d5970055 | Michael S. Tsirkin | uint64_t start_addr, |
105 | d5970055 | Michael S. Tsirkin | uint64_t size) |
106 | d5970055 | Michael S. Tsirkin | { |
107 | d5970055 | Michael S. Tsirkin | int from, to, n = dev->mem->nregions;
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108 | d5970055 | Michael S. Tsirkin | /* Track overlapping/split regions for sanity checking. */
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109 | d5970055 | Michael S. Tsirkin | int overlap_start = 0, overlap_end = 0, overlap_middle = 0, split = 0; |
110 | d5970055 | Michael S. Tsirkin | |
111 | d5970055 | Michael S. Tsirkin | for (from = 0, to = 0; from < n; ++from, ++to) { |
112 | d5970055 | Michael S. Tsirkin | struct vhost_memory_region *reg = dev->mem->regions + to;
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113 | d5970055 | Michael S. Tsirkin | uint64_t reglast; |
114 | d5970055 | Michael S. Tsirkin | uint64_t memlast; |
115 | d5970055 | Michael S. Tsirkin | uint64_t change; |
116 | d5970055 | Michael S. Tsirkin | |
117 | d5970055 | Michael S. Tsirkin | /* clone old region */
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118 | d5970055 | Michael S. Tsirkin | if (to != from) {
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119 | d5970055 | Michael S. Tsirkin | memcpy(reg, dev->mem->regions + from, sizeof *reg);
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120 | d5970055 | Michael S. Tsirkin | } |
121 | d5970055 | Michael S. Tsirkin | |
122 | d5970055 | Michael S. Tsirkin | /* No overlap is simple */
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123 | d5970055 | Michael S. Tsirkin | if (!ranges_overlap(reg->guest_phys_addr, reg->memory_size,
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124 | d5970055 | Michael S. Tsirkin | start_addr, size)) { |
125 | d5970055 | Michael S. Tsirkin | continue;
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126 | d5970055 | Michael S. Tsirkin | } |
127 | d5970055 | Michael S. Tsirkin | |
128 | d5970055 | Michael S. Tsirkin | /* Split only happens if supplied region
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129 | d5970055 | Michael S. Tsirkin | * is in the middle of an existing one. Thus it can not
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130 | d5970055 | Michael S. Tsirkin | * overlap with any other existing region. */
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131 | d5970055 | Michael S. Tsirkin | assert(!split); |
132 | d5970055 | Michael S. Tsirkin | |
133 | d5970055 | Michael S. Tsirkin | reglast = range_get_last(reg->guest_phys_addr, reg->memory_size); |
134 | d5970055 | Michael S. Tsirkin | memlast = range_get_last(start_addr, size); |
135 | d5970055 | Michael S. Tsirkin | |
136 | d5970055 | Michael S. Tsirkin | /* Remove whole region */
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137 | d5970055 | Michael S. Tsirkin | if (start_addr <= reg->guest_phys_addr && memlast >= reglast) {
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138 | d5970055 | Michael S. Tsirkin | --dev->mem->nregions; |
139 | d5970055 | Michael S. Tsirkin | --to; |
140 | d5970055 | Michael S. Tsirkin | ++overlap_middle; |
141 | d5970055 | Michael S. Tsirkin | continue;
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142 | d5970055 | Michael S. Tsirkin | } |
143 | d5970055 | Michael S. Tsirkin | |
144 | d5970055 | Michael S. Tsirkin | /* Shrink region */
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145 | d5970055 | Michael S. Tsirkin | if (memlast >= reglast) {
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146 | d5970055 | Michael S. Tsirkin | reg->memory_size = start_addr - reg->guest_phys_addr; |
147 | d5970055 | Michael S. Tsirkin | assert(reg->memory_size); |
148 | d5970055 | Michael S. Tsirkin | assert(!overlap_end); |
149 | d5970055 | Michael S. Tsirkin | ++overlap_end; |
150 | d5970055 | Michael S. Tsirkin | continue;
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151 | d5970055 | Michael S. Tsirkin | } |
152 | d5970055 | Michael S. Tsirkin | |
153 | d5970055 | Michael S. Tsirkin | /* Shift region */
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154 | d5970055 | Michael S. Tsirkin | if (start_addr <= reg->guest_phys_addr) {
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155 | d5970055 | Michael S. Tsirkin | change = memlast + 1 - reg->guest_phys_addr;
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156 | d5970055 | Michael S. Tsirkin | reg->memory_size -= change; |
157 | d5970055 | Michael S. Tsirkin | reg->guest_phys_addr += change; |
158 | d5970055 | Michael S. Tsirkin | reg->userspace_addr += change; |
159 | d5970055 | Michael S. Tsirkin | assert(reg->memory_size); |
160 | d5970055 | Michael S. Tsirkin | assert(!overlap_start); |
161 | d5970055 | Michael S. Tsirkin | ++overlap_start; |
162 | d5970055 | Michael S. Tsirkin | continue;
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163 | d5970055 | Michael S. Tsirkin | } |
164 | d5970055 | Michael S. Tsirkin | |
165 | d5970055 | Michael S. Tsirkin | /* This only happens if supplied region
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166 | d5970055 | Michael S. Tsirkin | * is in the middle of an existing one. Thus it can not
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167 | d5970055 | Michael S. Tsirkin | * overlap with any other existing region. */
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168 | d5970055 | Michael S. Tsirkin | assert(!overlap_start); |
169 | d5970055 | Michael S. Tsirkin | assert(!overlap_end); |
170 | d5970055 | Michael S. Tsirkin | assert(!overlap_middle); |
171 | d5970055 | Michael S. Tsirkin | /* Split region: shrink first part, shift second part. */
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172 | d5970055 | Michael S. Tsirkin | memcpy(dev->mem->regions + n, reg, sizeof *reg);
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173 | d5970055 | Michael S. Tsirkin | reg->memory_size = start_addr - reg->guest_phys_addr; |
174 | d5970055 | Michael S. Tsirkin | assert(reg->memory_size); |
175 | d5970055 | Michael S. Tsirkin | change = memlast + 1 - reg->guest_phys_addr;
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176 | d5970055 | Michael S. Tsirkin | reg = dev->mem->regions + n; |
177 | d5970055 | Michael S. Tsirkin | reg->memory_size -= change; |
178 | d5970055 | Michael S. Tsirkin | assert(reg->memory_size); |
179 | d5970055 | Michael S. Tsirkin | reg->guest_phys_addr += change; |
180 | d5970055 | Michael S. Tsirkin | reg->userspace_addr += change; |
181 | d5970055 | Michael S. Tsirkin | /* Never add more than 1 region */
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182 | d5970055 | Michael S. Tsirkin | assert(dev->mem->nregions == n); |
183 | d5970055 | Michael S. Tsirkin | ++dev->mem->nregions; |
184 | d5970055 | Michael S. Tsirkin | ++split; |
185 | d5970055 | Michael S. Tsirkin | } |
186 | d5970055 | Michael S. Tsirkin | } |
187 | d5970055 | Michael S. Tsirkin | |
188 | d5970055 | Michael S. Tsirkin | /* Called after unassign, so no regions overlap the given range. */
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189 | d5970055 | Michael S. Tsirkin | static void vhost_dev_assign_memory(struct vhost_dev *dev, |
190 | d5970055 | Michael S. Tsirkin | uint64_t start_addr, |
191 | d5970055 | Michael S. Tsirkin | uint64_t size, |
192 | d5970055 | Michael S. Tsirkin | uint64_t uaddr) |
193 | d5970055 | Michael S. Tsirkin | { |
194 | d5970055 | Michael S. Tsirkin | int from, to;
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195 | d5970055 | Michael S. Tsirkin | struct vhost_memory_region *merged = NULL; |
196 | d5970055 | Michael S. Tsirkin | for (from = 0, to = 0; from < dev->mem->nregions; ++from, ++to) { |
197 | d5970055 | Michael S. Tsirkin | struct vhost_memory_region *reg = dev->mem->regions + to;
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198 | d5970055 | Michael S. Tsirkin | uint64_t prlast, urlast; |
199 | d5970055 | Michael S. Tsirkin | uint64_t pmlast, umlast; |
200 | d5970055 | Michael S. Tsirkin | uint64_t s, e, u; |
201 | d5970055 | Michael S. Tsirkin | |
202 | d5970055 | Michael S. Tsirkin | /* clone old region */
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203 | d5970055 | Michael S. Tsirkin | if (to != from) {
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204 | d5970055 | Michael S. Tsirkin | memcpy(reg, dev->mem->regions + from, sizeof *reg);
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205 | d5970055 | Michael S. Tsirkin | } |
206 | d5970055 | Michael S. Tsirkin | prlast = range_get_last(reg->guest_phys_addr, reg->memory_size); |
207 | d5970055 | Michael S. Tsirkin | pmlast = range_get_last(start_addr, size); |
208 | d5970055 | Michael S. Tsirkin | urlast = range_get_last(reg->userspace_addr, reg->memory_size); |
209 | d5970055 | Michael S. Tsirkin | umlast = range_get_last(uaddr, size); |
210 | d5970055 | Michael S. Tsirkin | |
211 | d5970055 | Michael S. Tsirkin | /* check for overlapping regions: should never happen. */
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212 | d5970055 | Michael S. Tsirkin | assert(prlast < start_addr || pmlast < reg->guest_phys_addr); |
213 | d5970055 | Michael S. Tsirkin | /* Not an adjacent or overlapping region - do not merge. */
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214 | d5970055 | Michael S. Tsirkin | if ((prlast + 1 != start_addr || urlast + 1 != uaddr) && |
215 | d5970055 | Michael S. Tsirkin | (pmlast + 1 != reg->guest_phys_addr ||
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216 | d5970055 | Michael S. Tsirkin | umlast + 1 != reg->userspace_addr)) {
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217 | d5970055 | Michael S. Tsirkin | continue;
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218 | d5970055 | Michael S. Tsirkin | } |
219 | d5970055 | Michael S. Tsirkin | |
220 | d5970055 | Michael S. Tsirkin | if (merged) {
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221 | d5970055 | Michael S. Tsirkin | --to; |
222 | d5970055 | Michael S. Tsirkin | assert(to >= 0);
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223 | d5970055 | Michael S. Tsirkin | } else {
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224 | d5970055 | Michael S. Tsirkin | merged = reg; |
225 | d5970055 | Michael S. Tsirkin | } |
226 | d5970055 | Michael S. Tsirkin | u = MIN(uaddr, reg->userspace_addr); |
227 | d5970055 | Michael S. Tsirkin | s = MIN(start_addr, reg->guest_phys_addr); |
228 | d5970055 | Michael S. Tsirkin | e = MAX(pmlast, prlast); |
229 | d5970055 | Michael S. Tsirkin | uaddr = merged->userspace_addr = u; |
230 | d5970055 | Michael S. Tsirkin | start_addr = merged->guest_phys_addr = s; |
231 | d5970055 | Michael S. Tsirkin | size = merged->memory_size = e - s + 1;
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232 | d5970055 | Michael S. Tsirkin | assert(merged->memory_size); |
233 | d5970055 | Michael S. Tsirkin | } |
234 | d5970055 | Michael S. Tsirkin | |
235 | d5970055 | Michael S. Tsirkin | if (!merged) {
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236 | d5970055 | Michael S. Tsirkin | struct vhost_memory_region *reg = dev->mem->regions + to;
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237 | d5970055 | Michael S. Tsirkin | memset(reg, 0, sizeof *reg); |
238 | d5970055 | Michael S. Tsirkin | reg->memory_size = size; |
239 | d5970055 | Michael S. Tsirkin | assert(reg->memory_size); |
240 | d5970055 | Michael S. Tsirkin | reg->guest_phys_addr = start_addr; |
241 | d5970055 | Michael S. Tsirkin | reg->userspace_addr = uaddr; |
242 | d5970055 | Michael S. Tsirkin | ++to; |
243 | d5970055 | Michael S. Tsirkin | } |
244 | d5970055 | Michael S. Tsirkin | assert(to <= dev->mem->nregions + 1);
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245 | d5970055 | Michael S. Tsirkin | dev->mem->nregions = to; |
246 | d5970055 | Michael S. Tsirkin | } |
247 | d5970055 | Michael S. Tsirkin | |
248 | d5970055 | Michael S. Tsirkin | static uint64_t vhost_get_log_size(struct vhost_dev *dev) |
249 | d5970055 | Michael S. Tsirkin | { |
250 | d5970055 | Michael S. Tsirkin | uint64_t log_size = 0;
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251 | d5970055 | Michael S. Tsirkin | int i;
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252 | d5970055 | Michael S. Tsirkin | for (i = 0; i < dev->mem->nregions; ++i) { |
253 | d5970055 | Michael S. Tsirkin | struct vhost_memory_region *reg = dev->mem->regions + i;
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254 | d5970055 | Michael S. Tsirkin | uint64_t last = range_get_last(reg->guest_phys_addr, |
255 | d5970055 | Michael S. Tsirkin | reg->memory_size); |
256 | d5970055 | Michael S. Tsirkin | log_size = MAX(log_size, last / VHOST_LOG_CHUNK + 1);
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257 | d5970055 | Michael S. Tsirkin | } |
258 | d5970055 | Michael S. Tsirkin | for (i = 0; i < dev->nvqs; ++i) { |
259 | d5970055 | Michael S. Tsirkin | struct vhost_virtqueue *vq = dev->vqs + i;
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260 | d5970055 | Michael S. Tsirkin | uint64_t last = vq->used_phys + vq->used_size - 1;
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261 | d5970055 | Michael S. Tsirkin | log_size = MAX(log_size, last / VHOST_LOG_CHUNK + 1);
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262 | d5970055 | Michael S. Tsirkin | } |
263 | d5970055 | Michael S. Tsirkin | return log_size;
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264 | d5970055 | Michael S. Tsirkin | } |
265 | d5970055 | Michael S. Tsirkin | |
266 | d5970055 | Michael S. Tsirkin | static inline void vhost_dev_log_resize(struct vhost_dev* dev, uint64_t size) |
267 | d5970055 | Michael S. Tsirkin | { |
268 | d5970055 | Michael S. Tsirkin | vhost_log_chunk_t *log; |
269 | d5970055 | Michael S. Tsirkin | uint64_t log_base; |
270 | 2817b260 | Avi Kivity | int r, i;
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271 | d5970055 | Michael S. Tsirkin | if (size) {
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272 | 7267c094 | Anthony Liguori | log = g_malloc0(size * sizeof *log);
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273 | d5970055 | Michael S. Tsirkin | } else {
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274 | d5970055 | Michael S. Tsirkin | log = NULL;
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275 | d5970055 | Michael S. Tsirkin | } |
276 | d5970055 | Michael S. Tsirkin | log_base = (uint64_t)(unsigned long)log; |
277 | d5970055 | Michael S. Tsirkin | r = ioctl(dev->control, VHOST_SET_LOG_BASE, &log_base); |
278 | d5970055 | Michael S. Tsirkin | assert(r >= 0);
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279 | 2817b260 | Avi Kivity | for (i = 0; i < dev->n_mem_sections; ++i) { |
280 | 2817b260 | Avi Kivity | vhost_sync_dirty_bitmap(dev, &dev->mem_sections[i], |
281 | 2817b260 | Avi Kivity | 0, (target_phys_addr_t)~0x0ull); |
282 | 2817b260 | Avi Kivity | } |
283 | d5970055 | Michael S. Tsirkin | if (dev->log) {
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284 | 7267c094 | Anthony Liguori | g_free(dev->log); |
285 | d5970055 | Michael S. Tsirkin | } |
286 | d5970055 | Michael S. Tsirkin | dev->log = log; |
287 | d5970055 | Michael S. Tsirkin | dev->log_size = size; |
288 | d5970055 | Michael S. Tsirkin | } |
289 | d5970055 | Michael S. Tsirkin | |
290 | d5970055 | Michael S. Tsirkin | static int vhost_verify_ring_mappings(struct vhost_dev *dev, |
291 | d5970055 | Michael S. Tsirkin | uint64_t start_addr, |
292 | d5970055 | Michael S. Tsirkin | uint64_t size) |
293 | d5970055 | Michael S. Tsirkin | { |
294 | d5970055 | Michael S. Tsirkin | int i;
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295 | d5970055 | Michael S. Tsirkin | for (i = 0; i < dev->nvqs; ++i) { |
296 | d5970055 | Michael S. Tsirkin | struct vhost_virtqueue *vq = dev->vqs + i;
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297 | d5970055 | Michael S. Tsirkin | target_phys_addr_t l; |
298 | d5970055 | Michael S. Tsirkin | void *p;
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299 | d5970055 | Michael S. Tsirkin | |
300 | d5970055 | Michael S. Tsirkin | if (!ranges_overlap(start_addr, size, vq->ring_phys, vq->ring_size)) {
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301 | d5970055 | Michael S. Tsirkin | continue;
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302 | d5970055 | Michael S. Tsirkin | } |
303 | d5970055 | Michael S. Tsirkin | l = vq->ring_size; |
304 | d5970055 | Michael S. Tsirkin | p = cpu_physical_memory_map(vq->ring_phys, &l, 1);
|
305 | d5970055 | Michael S. Tsirkin | if (!p || l != vq->ring_size) {
|
306 | d5970055 | Michael S. Tsirkin | fprintf(stderr, "Unable to map ring buffer for ring %d\n", i);
|
307 | d5970055 | Michael S. Tsirkin | return -ENOMEM;
|
308 | d5970055 | Michael S. Tsirkin | } |
309 | d5970055 | Michael S. Tsirkin | if (p != vq->ring) {
|
310 | d5970055 | Michael S. Tsirkin | fprintf(stderr, "Ring buffer relocated for ring %d\n", i);
|
311 | d5970055 | Michael S. Tsirkin | return -EBUSY;
|
312 | d5970055 | Michael S. Tsirkin | } |
313 | d5970055 | Michael S. Tsirkin | cpu_physical_memory_unmap(p, l, 0, 0); |
314 | d5970055 | Michael S. Tsirkin | } |
315 | d5970055 | Michael S. Tsirkin | return 0; |
316 | d5970055 | Michael S. Tsirkin | } |
317 | d5970055 | Michael S. Tsirkin | |
318 | 4e789564 | Michael S. Tsirkin | static struct vhost_memory_region *vhost_dev_find_reg(struct vhost_dev *dev, |
319 | 4e789564 | Michael S. Tsirkin | uint64_t start_addr, |
320 | 4e789564 | Michael S. Tsirkin | uint64_t size) |
321 | 4e789564 | Michael S. Tsirkin | { |
322 | 4e789564 | Michael S. Tsirkin | int i, n = dev->mem->nregions;
|
323 | 4e789564 | Michael S. Tsirkin | for (i = 0; i < n; ++i) { |
324 | 4e789564 | Michael S. Tsirkin | struct vhost_memory_region *reg = dev->mem->regions + i;
|
325 | 4e789564 | Michael S. Tsirkin | if (ranges_overlap(reg->guest_phys_addr, reg->memory_size,
|
326 | 4e789564 | Michael S. Tsirkin | start_addr, size)) { |
327 | 4e789564 | Michael S. Tsirkin | return reg;
|
328 | 4e789564 | Michael S. Tsirkin | } |
329 | 4e789564 | Michael S. Tsirkin | } |
330 | 4e789564 | Michael S. Tsirkin | return NULL; |
331 | 4e789564 | Michael S. Tsirkin | } |
332 | 4e789564 | Michael S. Tsirkin | |
333 | 4e789564 | Michael S. Tsirkin | static bool vhost_dev_cmp_memory(struct vhost_dev *dev, |
334 | 4e789564 | Michael S. Tsirkin | uint64_t start_addr, |
335 | 4e789564 | Michael S. Tsirkin | uint64_t size, |
336 | 4e789564 | Michael S. Tsirkin | uint64_t uaddr) |
337 | 4e789564 | Michael S. Tsirkin | { |
338 | 4e789564 | Michael S. Tsirkin | struct vhost_memory_region *reg = vhost_dev_find_reg(dev, start_addr, size);
|
339 | 4e789564 | Michael S. Tsirkin | uint64_t reglast; |
340 | 4e789564 | Michael S. Tsirkin | uint64_t memlast; |
341 | 4e789564 | Michael S. Tsirkin | |
342 | 4e789564 | Michael S. Tsirkin | if (!reg) {
|
343 | 4e789564 | Michael S. Tsirkin | return true; |
344 | 4e789564 | Michael S. Tsirkin | } |
345 | 4e789564 | Michael S. Tsirkin | |
346 | 4e789564 | Michael S. Tsirkin | reglast = range_get_last(reg->guest_phys_addr, reg->memory_size); |
347 | 4e789564 | Michael S. Tsirkin | memlast = range_get_last(start_addr, size); |
348 | 4e789564 | Michael S. Tsirkin | |
349 | 4e789564 | Michael S. Tsirkin | /* Need to extend region? */
|
350 | 4e789564 | Michael S. Tsirkin | if (start_addr < reg->guest_phys_addr || memlast > reglast) {
|
351 | 4e789564 | Michael S. Tsirkin | return true; |
352 | 4e789564 | Michael S. Tsirkin | } |
353 | 4e789564 | Michael S. Tsirkin | /* userspace_addr changed? */
|
354 | 4e789564 | Michael S. Tsirkin | return uaddr != reg->userspace_addr + start_addr - reg->guest_phys_addr;
|
355 | 4e789564 | Michael S. Tsirkin | } |
356 | 4e789564 | Michael S. Tsirkin | |
357 | 04097f7c | Avi Kivity | static void vhost_set_memory(MemoryListener *listener, |
358 | 04097f7c | Avi Kivity | MemoryRegionSection *section, |
359 | 04097f7c | Avi Kivity | bool add)
|
360 | d5970055 | Michael S. Tsirkin | { |
361 | 04097f7c | Avi Kivity | struct vhost_dev *dev = container_of(listener, struct vhost_dev, |
362 | 04097f7c | Avi Kivity | memory_listener); |
363 | 04097f7c | Avi Kivity | target_phys_addr_t start_addr = section->offset_within_address_space; |
364 | 04097f7c | Avi Kivity | ram_addr_t size = section->size; |
365 | 04097f7c | Avi Kivity | bool log_dirty = memory_region_is_logging(section->mr);
|
366 | d5970055 | Michael S. Tsirkin | int s = offsetof(struct vhost_memory, regions) + |
367 | d5970055 | Michael S. Tsirkin | (dev->mem->nregions + 1) * sizeof dev->mem->regions[0]; |
368 | d5970055 | Michael S. Tsirkin | uint64_t log_size; |
369 | d5970055 | Michael S. Tsirkin | int r;
|
370 | 04097f7c | Avi Kivity | void *ram;
|
371 | 04097f7c | Avi Kivity | |
372 | 7267c094 | Anthony Liguori | dev->mem = g_realloc(dev->mem, s); |
373 | d5970055 | Michael S. Tsirkin | |
374 | f5a4e64f | Michael S. Tsirkin | if (log_dirty) {
|
375 | 04097f7c | Avi Kivity | add = false;
|
376 | f5a4e64f | Michael S. Tsirkin | } |
377 | f5a4e64f | Michael S. Tsirkin | |
378 | d5970055 | Michael S. Tsirkin | assert(size); |
379 | d5970055 | Michael S. Tsirkin | |
380 | 4e789564 | Michael S. Tsirkin | /* Optimize no-change case. At least cirrus_vga does this a lot at this time. */
|
381 | d743c382 | Avi Kivity | ram = memory_region_get_ram_ptr(section->mr) + section->offset_within_region; |
382 | 04097f7c | Avi Kivity | if (add) {
|
383 | 04097f7c | Avi Kivity | if (!vhost_dev_cmp_memory(dev, start_addr, size, (uintptr_t)ram)) {
|
384 | 4e789564 | Michael S. Tsirkin | /* Region exists with same address. Nothing to do. */
|
385 | 4e789564 | Michael S. Tsirkin | return;
|
386 | 4e789564 | Michael S. Tsirkin | } |
387 | 4e789564 | Michael S. Tsirkin | } else {
|
388 | 4e789564 | Michael S. Tsirkin | if (!vhost_dev_find_reg(dev, start_addr, size)) {
|
389 | 4e789564 | Michael S. Tsirkin | /* Removing region that we don't access. Nothing to do. */
|
390 | 4e789564 | Michael S. Tsirkin | return;
|
391 | 4e789564 | Michael S. Tsirkin | } |
392 | 4e789564 | Michael S. Tsirkin | } |
393 | 4e789564 | Michael S. Tsirkin | |
394 | d5970055 | Michael S. Tsirkin | vhost_dev_unassign_memory(dev, start_addr, size); |
395 | 04097f7c | Avi Kivity | if (add) {
|
396 | d5970055 | Michael S. Tsirkin | /* Add given mapping, merging adjacent regions if any */
|
397 | 04097f7c | Avi Kivity | vhost_dev_assign_memory(dev, start_addr, size, (uintptr_t)ram); |
398 | d5970055 | Michael S. Tsirkin | } else {
|
399 | d5970055 | Michael S. Tsirkin | /* Remove old mapping for this memory, if any. */
|
400 | d5970055 | Michael S. Tsirkin | vhost_dev_unassign_memory(dev, start_addr, size); |
401 | d5970055 | Michael S. Tsirkin | } |
402 | d5970055 | Michael S. Tsirkin | |
403 | d5970055 | Michael S. Tsirkin | if (!dev->started) {
|
404 | d5970055 | Michael S. Tsirkin | return;
|
405 | d5970055 | Michael S. Tsirkin | } |
406 | d5970055 | Michael S. Tsirkin | |
407 | d5970055 | Michael S. Tsirkin | if (dev->started) {
|
408 | d5970055 | Michael S. Tsirkin | r = vhost_verify_ring_mappings(dev, start_addr, size); |
409 | d5970055 | Michael S. Tsirkin | assert(r >= 0);
|
410 | d5970055 | Michael S. Tsirkin | } |
411 | d5970055 | Michael S. Tsirkin | |
412 | d5970055 | Michael S. Tsirkin | if (!dev->log_enabled) {
|
413 | d5970055 | Michael S. Tsirkin | r = ioctl(dev->control, VHOST_SET_MEM_TABLE, dev->mem); |
414 | d5970055 | Michael S. Tsirkin | assert(r >= 0);
|
415 | d5970055 | Michael S. Tsirkin | return;
|
416 | d5970055 | Michael S. Tsirkin | } |
417 | d5970055 | Michael S. Tsirkin | log_size = vhost_get_log_size(dev); |
418 | d5970055 | Michael S. Tsirkin | /* We allocate an extra 4K bytes to log,
|
419 | d5970055 | Michael S. Tsirkin | * to reduce the * number of reallocations. */
|
420 | d5970055 | Michael S. Tsirkin | #define VHOST_LOG_BUFFER (0x1000 / sizeof *dev->log) |
421 | d5970055 | Michael S. Tsirkin | /* To log more, must increase log size before table update. */
|
422 | d5970055 | Michael S. Tsirkin | if (dev->log_size < log_size) {
|
423 | d5970055 | Michael S. Tsirkin | vhost_dev_log_resize(dev, log_size + VHOST_LOG_BUFFER); |
424 | d5970055 | Michael S. Tsirkin | } |
425 | d5970055 | Michael S. Tsirkin | r = ioctl(dev->control, VHOST_SET_MEM_TABLE, dev->mem); |
426 | d5970055 | Michael S. Tsirkin | assert(r >= 0);
|
427 | d5970055 | Michael S. Tsirkin | /* To log less, can only decrease log size after table update. */
|
428 | d5970055 | Michael S. Tsirkin | if (dev->log_size > log_size + VHOST_LOG_BUFFER) {
|
429 | d5970055 | Michael S. Tsirkin | vhost_dev_log_resize(dev, log_size); |
430 | d5970055 | Michael S. Tsirkin | } |
431 | d5970055 | Michael S. Tsirkin | } |
432 | d5970055 | Michael S. Tsirkin | |
433 | c49450b9 | Avi Kivity | static bool vhost_section(MemoryRegionSection *section) |
434 | c49450b9 | Avi Kivity | { |
435 | c49450b9 | Avi Kivity | return section->address_space == get_system_memory()
|
436 | c49450b9 | Avi Kivity | && memory_region_is_ram(section->mr); |
437 | c49450b9 | Avi Kivity | } |
438 | c49450b9 | Avi Kivity | |
439 | 04097f7c | Avi Kivity | static void vhost_region_add(MemoryListener *listener, |
440 | 04097f7c | Avi Kivity | MemoryRegionSection *section) |
441 | 04097f7c | Avi Kivity | { |
442 | 2817b260 | Avi Kivity | struct vhost_dev *dev = container_of(listener, struct vhost_dev, |
443 | 2817b260 | Avi Kivity | memory_listener); |
444 | 2817b260 | Avi Kivity | |
445 | c49450b9 | Avi Kivity | if (!vhost_section(section)) {
|
446 | c49450b9 | Avi Kivity | return;
|
447 | c49450b9 | Avi Kivity | } |
448 | c49450b9 | Avi Kivity | |
449 | 2817b260 | Avi Kivity | ++dev->n_mem_sections; |
450 | 2817b260 | Avi Kivity | dev->mem_sections = g_renew(MemoryRegionSection, dev->mem_sections, |
451 | 2817b260 | Avi Kivity | dev->n_mem_sections); |
452 | 2817b260 | Avi Kivity | dev->mem_sections[dev->n_mem_sections - 1] = *section;
|
453 | 04097f7c | Avi Kivity | vhost_set_memory(listener, section, true);
|
454 | 04097f7c | Avi Kivity | } |
455 | 04097f7c | Avi Kivity | |
456 | 04097f7c | Avi Kivity | static void vhost_region_del(MemoryListener *listener, |
457 | 04097f7c | Avi Kivity | MemoryRegionSection *section) |
458 | 04097f7c | Avi Kivity | { |
459 | 2817b260 | Avi Kivity | struct vhost_dev *dev = container_of(listener, struct vhost_dev, |
460 | 2817b260 | Avi Kivity | memory_listener); |
461 | 2817b260 | Avi Kivity | int i;
|
462 | 2817b260 | Avi Kivity | |
463 | c49450b9 | Avi Kivity | if (!vhost_section(section)) {
|
464 | c49450b9 | Avi Kivity | return;
|
465 | c49450b9 | Avi Kivity | } |
466 | c49450b9 | Avi Kivity | |
467 | 04097f7c | Avi Kivity | vhost_set_memory(listener, section, false);
|
468 | 2817b260 | Avi Kivity | for (i = 0; i < dev->n_mem_sections; ++i) { |
469 | 2817b260 | Avi Kivity | if (dev->mem_sections[i].offset_within_address_space
|
470 | 2817b260 | Avi Kivity | == section->offset_within_address_space) { |
471 | 2817b260 | Avi Kivity | --dev->n_mem_sections; |
472 | 2817b260 | Avi Kivity | memmove(&dev->mem_sections[i], &dev->mem_sections[i+1],
|
473 | 637f7a6a | Avi Kivity | (dev->n_mem_sections - i) * sizeof(*dev->mem_sections));
|
474 | 2817b260 | Avi Kivity | break;
|
475 | 2817b260 | Avi Kivity | } |
476 | 2817b260 | Avi Kivity | } |
477 | 04097f7c | Avi Kivity | } |
478 | 04097f7c | Avi Kivity | |
479 | d5970055 | Michael S. Tsirkin | static int vhost_virtqueue_set_addr(struct vhost_dev *dev, |
480 | d5970055 | Michael S. Tsirkin | struct vhost_virtqueue *vq,
|
481 | d5970055 | Michael S. Tsirkin | unsigned idx, bool enable_log) |
482 | d5970055 | Michael S. Tsirkin | { |
483 | d5970055 | Michael S. Tsirkin | struct vhost_vring_addr addr = {
|
484 | d5970055 | Michael S. Tsirkin | .index = idx, |
485 | 2b3af999 | Stefan Weil | .desc_user_addr = (uint64_t)(unsigned long)vq->desc, |
486 | 2b3af999 | Stefan Weil | .avail_user_addr = (uint64_t)(unsigned long)vq->avail, |
487 | 2b3af999 | Stefan Weil | .used_user_addr = (uint64_t)(unsigned long)vq->used, |
488 | d5970055 | Michael S. Tsirkin | .log_guest_addr = vq->used_phys, |
489 | d5970055 | Michael S. Tsirkin | .flags = enable_log ? (1 << VHOST_VRING_F_LOG) : 0, |
490 | d5970055 | Michael S. Tsirkin | }; |
491 | d5970055 | Michael S. Tsirkin | int r = ioctl(dev->control, VHOST_SET_VRING_ADDR, &addr);
|
492 | d5970055 | Michael S. Tsirkin | if (r < 0) { |
493 | d5970055 | Michael S. Tsirkin | return -errno;
|
494 | d5970055 | Michael S. Tsirkin | } |
495 | d5970055 | Michael S. Tsirkin | return 0; |
496 | d5970055 | Michael S. Tsirkin | } |
497 | d5970055 | Michael S. Tsirkin | |
498 | d5970055 | Michael S. Tsirkin | static int vhost_dev_set_features(struct vhost_dev *dev, bool enable_log) |
499 | d5970055 | Michael S. Tsirkin | { |
500 | d5970055 | Michael S. Tsirkin | uint64_t features = dev->acked_features; |
501 | d5970055 | Michael S. Tsirkin | int r;
|
502 | d5970055 | Michael S. Tsirkin | if (enable_log) {
|
503 | d5970055 | Michael S. Tsirkin | features |= 0x1 << VHOST_F_LOG_ALL;
|
504 | d5970055 | Michael S. Tsirkin | } |
505 | d5970055 | Michael S. Tsirkin | r = ioctl(dev->control, VHOST_SET_FEATURES, &features); |
506 | d5970055 | Michael S. Tsirkin | return r < 0 ? -errno : 0; |
507 | d5970055 | Michael S. Tsirkin | } |
508 | d5970055 | Michael S. Tsirkin | |
509 | d5970055 | Michael S. Tsirkin | static int vhost_dev_set_log(struct vhost_dev *dev, bool enable_log) |
510 | d5970055 | Michael S. Tsirkin | { |
511 | d5970055 | Michael S. Tsirkin | int r, t, i;
|
512 | d5970055 | Michael S. Tsirkin | r = vhost_dev_set_features(dev, enable_log); |
513 | d5970055 | Michael S. Tsirkin | if (r < 0) { |
514 | d5970055 | Michael S. Tsirkin | goto err_features;
|
515 | d5970055 | Michael S. Tsirkin | } |
516 | d5970055 | Michael S. Tsirkin | for (i = 0; i < dev->nvqs; ++i) { |
517 | d5970055 | Michael S. Tsirkin | r = vhost_virtqueue_set_addr(dev, dev->vqs + i, i, |
518 | d5970055 | Michael S. Tsirkin | enable_log); |
519 | d5970055 | Michael S. Tsirkin | if (r < 0) { |
520 | d5970055 | Michael S. Tsirkin | goto err_vq;
|
521 | d5970055 | Michael S. Tsirkin | } |
522 | d5970055 | Michael S. Tsirkin | } |
523 | d5970055 | Michael S. Tsirkin | return 0; |
524 | d5970055 | Michael S. Tsirkin | err_vq:
|
525 | d5970055 | Michael S. Tsirkin | for (; i >= 0; --i) { |
526 | d5970055 | Michael S. Tsirkin | t = vhost_virtqueue_set_addr(dev, dev->vqs + i, i, |
527 | d5970055 | Michael S. Tsirkin | dev->log_enabled); |
528 | d5970055 | Michael S. Tsirkin | assert(t >= 0);
|
529 | d5970055 | Michael S. Tsirkin | } |
530 | d5970055 | Michael S. Tsirkin | t = vhost_dev_set_features(dev, dev->log_enabled); |
531 | d5970055 | Michael S. Tsirkin | assert(t >= 0);
|
532 | d5970055 | Michael S. Tsirkin | err_features:
|
533 | d5970055 | Michael S. Tsirkin | return r;
|
534 | d5970055 | Michael S. Tsirkin | } |
535 | d5970055 | Michael S. Tsirkin | |
536 | 04097f7c | Avi Kivity | static int vhost_migration_log(MemoryListener *listener, int enable) |
537 | d5970055 | Michael S. Tsirkin | { |
538 | 04097f7c | Avi Kivity | struct vhost_dev *dev = container_of(listener, struct vhost_dev, |
539 | 04097f7c | Avi Kivity | memory_listener); |
540 | d5970055 | Michael S. Tsirkin | int r;
|
541 | d5970055 | Michael S. Tsirkin | if (!!enable == dev->log_enabled) {
|
542 | d5970055 | Michael S. Tsirkin | return 0; |
543 | d5970055 | Michael S. Tsirkin | } |
544 | d5970055 | Michael S. Tsirkin | if (!dev->started) {
|
545 | d5970055 | Michael S. Tsirkin | dev->log_enabled = enable; |
546 | d5970055 | Michael S. Tsirkin | return 0; |
547 | d5970055 | Michael S. Tsirkin | } |
548 | d5970055 | Michael S. Tsirkin | if (!enable) {
|
549 | d5970055 | Michael S. Tsirkin | r = vhost_dev_set_log(dev, false);
|
550 | d5970055 | Michael S. Tsirkin | if (r < 0) { |
551 | d5970055 | Michael S. Tsirkin | return r;
|
552 | d5970055 | Michael S. Tsirkin | } |
553 | d5970055 | Michael S. Tsirkin | if (dev->log) {
|
554 | 7267c094 | Anthony Liguori | g_free(dev->log); |
555 | d5970055 | Michael S. Tsirkin | } |
556 | d5970055 | Michael S. Tsirkin | dev->log = NULL;
|
557 | d5970055 | Michael S. Tsirkin | dev->log_size = 0;
|
558 | d5970055 | Michael S. Tsirkin | } else {
|
559 | d5970055 | Michael S. Tsirkin | vhost_dev_log_resize(dev, vhost_get_log_size(dev)); |
560 | d5970055 | Michael S. Tsirkin | r = vhost_dev_set_log(dev, true);
|
561 | d5970055 | Michael S. Tsirkin | if (r < 0) { |
562 | d5970055 | Michael S. Tsirkin | return r;
|
563 | d5970055 | Michael S. Tsirkin | } |
564 | d5970055 | Michael S. Tsirkin | } |
565 | d5970055 | Michael S. Tsirkin | dev->log_enabled = enable; |
566 | d5970055 | Michael S. Tsirkin | return 0; |
567 | d5970055 | Michael S. Tsirkin | } |
568 | d5970055 | Michael S. Tsirkin | |
569 | 04097f7c | Avi Kivity | static void vhost_log_global_start(MemoryListener *listener) |
570 | 04097f7c | Avi Kivity | { |
571 | 04097f7c | Avi Kivity | int r;
|
572 | 04097f7c | Avi Kivity | |
573 | 04097f7c | Avi Kivity | r = vhost_migration_log(listener, true);
|
574 | 04097f7c | Avi Kivity | if (r < 0) { |
575 | 04097f7c | Avi Kivity | abort(); |
576 | 04097f7c | Avi Kivity | } |
577 | 04097f7c | Avi Kivity | } |
578 | 04097f7c | Avi Kivity | |
579 | 04097f7c | Avi Kivity | static void vhost_log_global_stop(MemoryListener *listener) |
580 | 04097f7c | Avi Kivity | { |
581 | 04097f7c | Avi Kivity | int r;
|
582 | 04097f7c | Avi Kivity | |
583 | 04097f7c | Avi Kivity | r = vhost_migration_log(listener, false);
|
584 | 04097f7c | Avi Kivity | if (r < 0) { |
585 | 04097f7c | Avi Kivity | abort(); |
586 | 04097f7c | Avi Kivity | } |
587 | 04097f7c | Avi Kivity | } |
588 | 04097f7c | Avi Kivity | |
589 | 04097f7c | Avi Kivity | static void vhost_log_start(MemoryListener *listener, |
590 | 04097f7c | Avi Kivity | MemoryRegionSection *section) |
591 | 04097f7c | Avi Kivity | { |
592 | 04097f7c | Avi Kivity | /* FIXME: implement */
|
593 | 04097f7c | Avi Kivity | } |
594 | 04097f7c | Avi Kivity | |
595 | 04097f7c | Avi Kivity | static void vhost_log_stop(MemoryListener *listener, |
596 | 04097f7c | Avi Kivity | MemoryRegionSection *section) |
597 | 04097f7c | Avi Kivity | { |
598 | 04097f7c | Avi Kivity | /* FIXME: implement */
|
599 | 04097f7c | Avi Kivity | } |
600 | 04097f7c | Avi Kivity | |
601 | d5970055 | Michael S. Tsirkin | static int vhost_virtqueue_init(struct vhost_dev *dev, |
602 | d5970055 | Michael S. Tsirkin | struct VirtIODevice *vdev,
|
603 | d5970055 | Michael S. Tsirkin | struct vhost_virtqueue *vq,
|
604 | d5970055 | Michael S. Tsirkin | unsigned idx)
|
605 | d5970055 | Michael S. Tsirkin | { |
606 | d5970055 | Michael S. Tsirkin | target_phys_addr_t s, l, a; |
607 | d5970055 | Michael S. Tsirkin | int r;
|
608 | d5970055 | Michael S. Tsirkin | struct vhost_vring_file file = {
|
609 | d5970055 | Michael S. Tsirkin | .index = idx, |
610 | d5970055 | Michael S. Tsirkin | }; |
611 | d5970055 | Michael S. Tsirkin | struct vhost_vring_state state = {
|
612 | d5970055 | Michael S. Tsirkin | .index = idx, |
613 | d5970055 | Michael S. Tsirkin | }; |
614 | d5970055 | Michael S. Tsirkin | struct VirtQueue *vvq = virtio_get_queue(vdev, idx);
|
615 | d5970055 | Michael S. Tsirkin | |
616 | d5970055 | Michael S. Tsirkin | vq->num = state.num = virtio_queue_get_num(vdev, idx); |
617 | d5970055 | Michael S. Tsirkin | r = ioctl(dev->control, VHOST_SET_VRING_NUM, &state); |
618 | d5970055 | Michael S. Tsirkin | if (r) {
|
619 | d5970055 | Michael S. Tsirkin | return -errno;
|
620 | d5970055 | Michael S. Tsirkin | } |
621 | d5970055 | Michael S. Tsirkin | |
622 | d5970055 | Michael S. Tsirkin | state.num = virtio_queue_get_last_avail_idx(vdev, idx); |
623 | d5970055 | Michael S. Tsirkin | r = ioctl(dev->control, VHOST_SET_VRING_BASE, &state); |
624 | d5970055 | Michael S. Tsirkin | if (r) {
|
625 | d5970055 | Michael S. Tsirkin | return -errno;
|
626 | d5970055 | Michael S. Tsirkin | } |
627 | d5970055 | Michael S. Tsirkin | |
628 | d5970055 | Michael S. Tsirkin | s = l = virtio_queue_get_desc_size(vdev, idx); |
629 | d5970055 | Michael S. Tsirkin | a = virtio_queue_get_desc_addr(vdev, idx); |
630 | d5970055 | Michael S. Tsirkin | vq->desc = cpu_physical_memory_map(a, &l, 0);
|
631 | d5970055 | Michael S. Tsirkin | if (!vq->desc || l != s) {
|
632 | d5970055 | Michael S. Tsirkin | r = -ENOMEM; |
633 | d5970055 | Michael S. Tsirkin | goto fail_alloc_desc;
|
634 | d5970055 | Michael S. Tsirkin | } |
635 | d5970055 | Michael S. Tsirkin | s = l = virtio_queue_get_avail_size(vdev, idx); |
636 | d5970055 | Michael S. Tsirkin | a = virtio_queue_get_avail_addr(vdev, idx); |
637 | d5970055 | Michael S. Tsirkin | vq->avail = cpu_physical_memory_map(a, &l, 0);
|
638 | d5970055 | Michael S. Tsirkin | if (!vq->avail || l != s) {
|
639 | d5970055 | Michael S. Tsirkin | r = -ENOMEM; |
640 | d5970055 | Michael S. Tsirkin | goto fail_alloc_avail;
|
641 | d5970055 | Michael S. Tsirkin | } |
642 | d5970055 | Michael S. Tsirkin | vq->used_size = s = l = virtio_queue_get_used_size(vdev, idx); |
643 | d5970055 | Michael S. Tsirkin | vq->used_phys = a = virtio_queue_get_used_addr(vdev, idx); |
644 | d5970055 | Michael S. Tsirkin | vq->used = cpu_physical_memory_map(a, &l, 1);
|
645 | d5970055 | Michael S. Tsirkin | if (!vq->used || l != s) {
|
646 | d5970055 | Michael S. Tsirkin | r = -ENOMEM; |
647 | d5970055 | Michael S. Tsirkin | goto fail_alloc_used;
|
648 | d5970055 | Michael S. Tsirkin | } |
649 | d5970055 | Michael S. Tsirkin | |
650 | d5970055 | Michael S. Tsirkin | vq->ring_size = s = l = virtio_queue_get_ring_size(vdev, idx); |
651 | d5970055 | Michael S. Tsirkin | vq->ring_phys = a = virtio_queue_get_ring_addr(vdev, idx); |
652 | d5970055 | Michael S. Tsirkin | vq->ring = cpu_physical_memory_map(a, &l, 1);
|
653 | d5970055 | Michael S. Tsirkin | if (!vq->ring || l != s) {
|
654 | d5970055 | Michael S. Tsirkin | r = -ENOMEM; |
655 | d5970055 | Michael S. Tsirkin | goto fail_alloc_ring;
|
656 | d5970055 | Michael S. Tsirkin | } |
657 | d5970055 | Michael S. Tsirkin | |
658 | d5970055 | Michael S. Tsirkin | r = vhost_virtqueue_set_addr(dev, vq, idx, dev->log_enabled); |
659 | d5970055 | Michael S. Tsirkin | if (r < 0) { |
660 | d5970055 | Michael S. Tsirkin | r = -errno; |
661 | d5970055 | Michael S. Tsirkin | goto fail_alloc;
|
662 | d5970055 | Michael S. Tsirkin | } |
663 | d5970055 | Michael S. Tsirkin | file.fd = event_notifier_get_fd(virtio_queue_get_host_notifier(vvq)); |
664 | d5970055 | Michael S. Tsirkin | r = ioctl(dev->control, VHOST_SET_VRING_KICK, &file); |
665 | d5970055 | Michael S. Tsirkin | if (r) {
|
666 | c8852121 | Michael S. Tsirkin | r = -errno; |
667 | d5970055 | Michael S. Tsirkin | goto fail_kick;
|
668 | d5970055 | Michael S. Tsirkin | } |
669 | d5970055 | Michael S. Tsirkin | |
670 | d5970055 | Michael S. Tsirkin | file.fd = event_notifier_get_fd(virtio_queue_get_guest_notifier(vvq)); |
671 | d5970055 | Michael S. Tsirkin | r = ioctl(dev->control, VHOST_SET_VRING_CALL, &file); |
672 | d5970055 | Michael S. Tsirkin | if (r) {
|
673 | c8852121 | Michael S. Tsirkin | r = -errno; |
674 | d5970055 | Michael S. Tsirkin | goto fail_call;
|
675 | d5970055 | Michael S. Tsirkin | } |
676 | d5970055 | Michael S. Tsirkin | |
677 | d5970055 | Michael S. Tsirkin | return 0; |
678 | d5970055 | Michael S. Tsirkin | |
679 | d5970055 | Michael S. Tsirkin | fail_call:
|
680 | d5970055 | Michael S. Tsirkin | fail_kick:
|
681 | d5970055 | Michael S. Tsirkin | fail_alloc:
|
682 | d5970055 | Michael S. Tsirkin | cpu_physical_memory_unmap(vq->ring, virtio_queue_get_ring_size(vdev, idx), |
683 | d5970055 | Michael S. Tsirkin | 0, 0); |
684 | d5970055 | Michael S. Tsirkin | fail_alloc_ring:
|
685 | d5970055 | Michael S. Tsirkin | cpu_physical_memory_unmap(vq->used, virtio_queue_get_used_size(vdev, idx), |
686 | d5970055 | Michael S. Tsirkin | 0, 0); |
687 | d5970055 | Michael S. Tsirkin | fail_alloc_used:
|
688 | d5970055 | Michael S. Tsirkin | cpu_physical_memory_unmap(vq->avail, virtio_queue_get_avail_size(vdev, idx), |
689 | d5970055 | Michael S. Tsirkin | 0, 0); |
690 | d5970055 | Michael S. Tsirkin | fail_alloc_avail:
|
691 | d5970055 | Michael S. Tsirkin | cpu_physical_memory_unmap(vq->desc, virtio_queue_get_desc_size(vdev, idx), |
692 | d5970055 | Michael S. Tsirkin | 0, 0); |
693 | d5970055 | Michael S. Tsirkin | fail_alloc_desc:
|
694 | d5970055 | Michael S. Tsirkin | return r;
|
695 | d5970055 | Michael S. Tsirkin | } |
696 | d5970055 | Michael S. Tsirkin | |
697 | d5970055 | Michael S. Tsirkin | static void vhost_virtqueue_cleanup(struct vhost_dev *dev, |
698 | d5970055 | Michael S. Tsirkin | struct VirtIODevice *vdev,
|
699 | d5970055 | Michael S. Tsirkin | struct vhost_virtqueue *vq,
|
700 | d5970055 | Michael S. Tsirkin | unsigned idx)
|
701 | d5970055 | Michael S. Tsirkin | { |
702 | d5970055 | Michael S. Tsirkin | struct vhost_vring_state state = {
|
703 | d5970055 | Michael S. Tsirkin | .index = idx, |
704 | d5970055 | Michael S. Tsirkin | }; |
705 | d5970055 | Michael S. Tsirkin | int r;
|
706 | d5970055 | Michael S. Tsirkin | r = ioctl(dev->control, VHOST_GET_VRING_BASE, &state); |
707 | d5970055 | Michael S. Tsirkin | if (r < 0) { |
708 | d5970055 | Michael S. Tsirkin | fprintf(stderr, "vhost VQ %d ring restore failed: %d\n", idx, r);
|
709 | d5970055 | Michael S. Tsirkin | fflush(stderr); |
710 | d5970055 | Michael S. Tsirkin | } |
711 | d5970055 | Michael S. Tsirkin | virtio_queue_set_last_avail_idx(vdev, idx, state.num); |
712 | d5970055 | Michael S. Tsirkin | assert (r >= 0);
|
713 | d5970055 | Michael S. Tsirkin | cpu_physical_memory_unmap(vq->ring, virtio_queue_get_ring_size(vdev, idx), |
714 | d5970055 | Michael S. Tsirkin | 0, virtio_queue_get_ring_size(vdev, idx));
|
715 | d5970055 | Michael S. Tsirkin | cpu_physical_memory_unmap(vq->used, virtio_queue_get_used_size(vdev, idx), |
716 | d5970055 | Michael S. Tsirkin | 1, virtio_queue_get_used_size(vdev, idx));
|
717 | d5970055 | Michael S. Tsirkin | cpu_physical_memory_unmap(vq->avail, virtio_queue_get_avail_size(vdev, idx), |
718 | d5970055 | Michael S. Tsirkin | 0, virtio_queue_get_avail_size(vdev, idx));
|
719 | d5970055 | Michael S. Tsirkin | cpu_physical_memory_unmap(vq->desc, virtio_queue_get_desc_size(vdev, idx), |
720 | d5970055 | Michael S. Tsirkin | 0, virtio_queue_get_desc_size(vdev, idx));
|
721 | d5970055 | Michael S. Tsirkin | } |
722 | d5970055 | Michael S. Tsirkin | |
723 | 5430a28f | mst@redhat.com | int vhost_dev_init(struct vhost_dev *hdev, int devfd, bool force) |
724 | d5970055 | Michael S. Tsirkin | { |
725 | d5970055 | Michael S. Tsirkin | uint64_t features; |
726 | d5970055 | Michael S. Tsirkin | int r;
|
727 | d5970055 | Michael S. Tsirkin | if (devfd >= 0) { |
728 | d5970055 | Michael S. Tsirkin | hdev->control = devfd; |
729 | d5970055 | Michael S. Tsirkin | } else {
|
730 | d5970055 | Michael S. Tsirkin | hdev->control = open("/dev/vhost-net", O_RDWR);
|
731 | d5970055 | Michael S. Tsirkin | if (hdev->control < 0) { |
732 | d5970055 | Michael S. Tsirkin | return -errno;
|
733 | d5970055 | Michael S. Tsirkin | } |
734 | d5970055 | Michael S. Tsirkin | } |
735 | d5970055 | Michael S. Tsirkin | r = ioctl(hdev->control, VHOST_SET_OWNER, NULL);
|
736 | d5970055 | Michael S. Tsirkin | if (r < 0) { |
737 | d5970055 | Michael S. Tsirkin | goto fail;
|
738 | d5970055 | Michael S. Tsirkin | } |
739 | d5970055 | Michael S. Tsirkin | |
740 | d5970055 | Michael S. Tsirkin | r = ioctl(hdev->control, VHOST_GET_FEATURES, &features); |
741 | d5970055 | Michael S. Tsirkin | if (r < 0) { |
742 | d5970055 | Michael S. Tsirkin | goto fail;
|
743 | d5970055 | Michael S. Tsirkin | } |
744 | d5970055 | Michael S. Tsirkin | hdev->features = features; |
745 | d5970055 | Michael S. Tsirkin | |
746 | 04097f7c | Avi Kivity | hdev->memory_listener = (MemoryListener) { |
747 | 04097f7c | Avi Kivity | .region_add = vhost_region_add, |
748 | 04097f7c | Avi Kivity | .region_del = vhost_region_del, |
749 | 04097f7c | Avi Kivity | .log_start = vhost_log_start, |
750 | 04097f7c | Avi Kivity | .log_stop = vhost_log_stop, |
751 | 04097f7c | Avi Kivity | .log_sync = vhost_log_sync, |
752 | 04097f7c | Avi Kivity | .log_global_start = vhost_log_global_start, |
753 | 04097f7c | Avi Kivity | .log_global_stop = vhost_log_global_stop, |
754 | 04097f7c | Avi Kivity | }; |
755 | 7267c094 | Anthony Liguori | hdev->mem = g_malloc0(offsetof(struct vhost_memory, regions));
|
756 | 2817b260 | Avi Kivity | hdev->n_mem_sections = 0;
|
757 | 2817b260 | Avi Kivity | hdev->mem_sections = NULL;
|
758 | d5970055 | Michael S. Tsirkin | hdev->log = NULL;
|
759 | d5970055 | Michael S. Tsirkin | hdev->log_size = 0;
|
760 | d5970055 | Michael S. Tsirkin | hdev->log_enabled = false;
|
761 | d5970055 | Michael S. Tsirkin | hdev->started = false;
|
762 | 04097f7c | Avi Kivity | memory_listener_register(&hdev->memory_listener); |
763 | 5430a28f | mst@redhat.com | hdev->force = force; |
764 | d5970055 | Michael S. Tsirkin | return 0; |
765 | d5970055 | Michael S. Tsirkin | fail:
|
766 | d5970055 | Michael S. Tsirkin | r = -errno; |
767 | d5970055 | Michael S. Tsirkin | close(hdev->control); |
768 | d5970055 | Michael S. Tsirkin | return r;
|
769 | d5970055 | Michael S. Tsirkin | } |
770 | d5970055 | Michael S. Tsirkin | |
771 | d5970055 | Michael S. Tsirkin | void vhost_dev_cleanup(struct vhost_dev *hdev) |
772 | d5970055 | Michael S. Tsirkin | { |
773 | 04097f7c | Avi Kivity | memory_listener_unregister(&hdev->memory_listener); |
774 | 7267c094 | Anthony Liguori | g_free(hdev->mem); |
775 | 2817b260 | Avi Kivity | g_free(hdev->mem_sections); |
776 | d5970055 | Michael S. Tsirkin | close(hdev->control); |
777 | d5970055 | Michael S. Tsirkin | } |
778 | d5970055 | Michael S. Tsirkin | |
779 | 5430a28f | mst@redhat.com | bool vhost_dev_query(struct vhost_dev *hdev, VirtIODevice *vdev) |
780 | 5430a28f | mst@redhat.com | { |
781 | 5430a28f | mst@redhat.com | return !vdev->binding->query_guest_notifiers ||
|
782 | 5430a28f | mst@redhat.com | vdev->binding->query_guest_notifiers(vdev->binding_opaque) || |
783 | 5430a28f | mst@redhat.com | hdev->force; |
784 | 5430a28f | mst@redhat.com | } |
785 | 5430a28f | mst@redhat.com | |
786 | b0b3db79 | Michael S. Tsirkin | /* Stop processing guest IO notifications in qemu.
|
787 | b0b3db79 | Michael S. Tsirkin | * Start processing them in vhost in kernel.
|
788 | b0b3db79 | Michael S. Tsirkin | */
|
789 | b0b3db79 | Michael S. Tsirkin | int vhost_dev_enable_notifiers(struct vhost_dev *hdev, VirtIODevice *vdev) |
790 | b0b3db79 | Michael S. Tsirkin | { |
791 | b0b3db79 | Michael S. Tsirkin | int i, r;
|
792 | b0b3db79 | Michael S. Tsirkin | if (!vdev->binding->set_host_notifier) {
|
793 | b0b3db79 | Michael S. Tsirkin | fprintf(stderr, "binding does not support host notifiers\n");
|
794 | b0b3db79 | Michael S. Tsirkin | r = -ENOSYS; |
795 | b0b3db79 | Michael S. Tsirkin | goto fail;
|
796 | b0b3db79 | Michael S. Tsirkin | } |
797 | b0b3db79 | Michael S. Tsirkin | |
798 | b0b3db79 | Michael S. Tsirkin | for (i = 0; i < hdev->nvqs; ++i) { |
799 | b0b3db79 | Michael S. Tsirkin | r = vdev->binding->set_host_notifier(vdev->binding_opaque, i, true);
|
800 | b0b3db79 | Michael S. Tsirkin | if (r < 0) { |
801 | b0b3db79 | Michael S. Tsirkin | fprintf(stderr, "vhost VQ %d notifier binding failed: %d\n", i, -r);
|
802 | b0b3db79 | Michael S. Tsirkin | goto fail_vq;
|
803 | b0b3db79 | Michael S. Tsirkin | } |
804 | b0b3db79 | Michael S. Tsirkin | } |
805 | b0b3db79 | Michael S. Tsirkin | |
806 | b0b3db79 | Michael S. Tsirkin | return 0; |
807 | b0b3db79 | Michael S. Tsirkin | fail_vq:
|
808 | b0b3db79 | Michael S. Tsirkin | while (--i >= 0) { |
809 | b0b3db79 | Michael S. Tsirkin | r = vdev->binding->set_host_notifier(vdev->binding_opaque, i, false);
|
810 | b0b3db79 | Michael S. Tsirkin | if (r < 0) { |
811 | b0b3db79 | Michael S. Tsirkin | fprintf(stderr, "vhost VQ %d notifier cleanup error: %d\n", i, -r);
|
812 | b0b3db79 | Michael S. Tsirkin | fflush(stderr); |
813 | b0b3db79 | Michael S. Tsirkin | } |
814 | b0b3db79 | Michael S. Tsirkin | assert (r >= 0);
|
815 | b0b3db79 | Michael S. Tsirkin | } |
816 | b0b3db79 | Michael S. Tsirkin | fail:
|
817 | b0b3db79 | Michael S. Tsirkin | return r;
|
818 | b0b3db79 | Michael S. Tsirkin | } |
819 | b0b3db79 | Michael S. Tsirkin | |
820 | b0b3db79 | Michael S. Tsirkin | /* Stop processing guest IO notifications in vhost.
|
821 | b0b3db79 | Michael S. Tsirkin | * Start processing them in qemu.
|
822 | b0b3db79 | Michael S. Tsirkin | * This might actually run the qemu handlers right away,
|
823 | b0b3db79 | Michael S. Tsirkin | * so virtio in qemu must be completely setup when this is called.
|
824 | b0b3db79 | Michael S. Tsirkin | */
|
825 | b0b3db79 | Michael S. Tsirkin | void vhost_dev_disable_notifiers(struct vhost_dev *hdev, VirtIODevice *vdev) |
826 | b0b3db79 | Michael S. Tsirkin | { |
827 | b0b3db79 | Michael S. Tsirkin | int i, r;
|
828 | b0b3db79 | Michael S. Tsirkin | |
829 | b0b3db79 | Michael S. Tsirkin | for (i = 0; i < hdev->nvqs; ++i) { |
830 | b0b3db79 | Michael S. Tsirkin | r = vdev->binding->set_host_notifier(vdev->binding_opaque, i, false);
|
831 | b0b3db79 | Michael S. Tsirkin | if (r < 0) { |
832 | b0b3db79 | Michael S. Tsirkin | fprintf(stderr, "vhost VQ %d notifier cleanup failed: %d\n", i, -r);
|
833 | b0b3db79 | Michael S. Tsirkin | fflush(stderr); |
834 | b0b3db79 | Michael S. Tsirkin | } |
835 | b0b3db79 | Michael S. Tsirkin | assert (r >= 0);
|
836 | b0b3db79 | Michael S. Tsirkin | } |
837 | b0b3db79 | Michael S. Tsirkin | } |
838 | b0b3db79 | Michael S. Tsirkin | |
839 | b0b3db79 | Michael S. Tsirkin | /* Host notifiers must be enabled at this point. */
|
840 | d5970055 | Michael S. Tsirkin | int vhost_dev_start(struct vhost_dev *hdev, VirtIODevice *vdev) |
841 | d5970055 | Michael S. Tsirkin | { |
842 | d5970055 | Michael S. Tsirkin | int i, r;
|
843 | 54dd9321 | Michael S. Tsirkin | if (!vdev->binding->set_guest_notifiers) {
|
844 | 54dd9321 | Michael S. Tsirkin | fprintf(stderr, "binding does not support guest notifiers\n");
|
845 | 54dd9321 | Michael S. Tsirkin | r = -ENOSYS; |
846 | 54dd9321 | Michael S. Tsirkin | goto fail;
|
847 | 54dd9321 | Michael S. Tsirkin | } |
848 | 54dd9321 | Michael S. Tsirkin | |
849 | 54dd9321 | Michael S. Tsirkin | r = vdev->binding->set_guest_notifiers(vdev->binding_opaque, true);
|
850 | 54dd9321 | Michael S. Tsirkin | if (r < 0) { |
851 | 54dd9321 | Michael S. Tsirkin | fprintf(stderr, "Error binding guest notifier: %d\n", -r);
|
852 | 54dd9321 | Michael S. Tsirkin | goto fail_notifiers;
|
853 | 54dd9321 | Michael S. Tsirkin | } |
854 | d5970055 | Michael S. Tsirkin | |
855 | d5970055 | Michael S. Tsirkin | r = vhost_dev_set_features(hdev, hdev->log_enabled); |
856 | d5970055 | Michael S. Tsirkin | if (r < 0) { |
857 | 54dd9321 | Michael S. Tsirkin | goto fail_features;
|
858 | d5970055 | Michael S. Tsirkin | } |
859 | d5970055 | Michael S. Tsirkin | r = ioctl(hdev->control, VHOST_SET_MEM_TABLE, hdev->mem); |
860 | d5970055 | Michael S. Tsirkin | if (r < 0) { |
861 | d5970055 | Michael S. Tsirkin | r = -errno; |
862 | 54dd9321 | Michael S. Tsirkin | goto fail_mem;
|
863 | d5970055 | Michael S. Tsirkin | } |
864 | d154e0ba | Michael S. Tsirkin | for (i = 0; i < hdev->nvqs; ++i) { |
865 | d154e0ba | Michael S. Tsirkin | r = vhost_virtqueue_init(hdev, |
866 | d154e0ba | Michael S. Tsirkin | vdev, |
867 | d154e0ba | Michael S. Tsirkin | hdev->vqs + i, |
868 | d154e0ba | Michael S. Tsirkin | i); |
869 | d154e0ba | Michael S. Tsirkin | if (r < 0) { |
870 | d154e0ba | Michael S. Tsirkin | goto fail_vq;
|
871 | d154e0ba | Michael S. Tsirkin | } |
872 | d154e0ba | Michael S. Tsirkin | } |
873 | d154e0ba | Michael S. Tsirkin | |
874 | d5970055 | Michael S. Tsirkin | if (hdev->log_enabled) {
|
875 | d5970055 | Michael S. Tsirkin | hdev->log_size = vhost_get_log_size(hdev); |
876 | d5970055 | Michael S. Tsirkin | hdev->log = hdev->log_size ? |
877 | 7267c094 | Anthony Liguori | g_malloc0(hdev->log_size * sizeof *hdev->log) : NULL; |
878 | d5970055 | Michael S. Tsirkin | r = ioctl(hdev->control, VHOST_SET_LOG_BASE, |
879 | d5970055 | Michael S. Tsirkin | (uint64_t)(unsigned long)hdev->log); |
880 | d5970055 | Michael S. Tsirkin | if (r < 0) { |
881 | d5970055 | Michael S. Tsirkin | r = -errno; |
882 | 54dd9321 | Michael S. Tsirkin | goto fail_log;
|
883 | d5970055 | Michael S. Tsirkin | } |
884 | d5970055 | Michael S. Tsirkin | } |
885 | d154e0ba | Michael S. Tsirkin | |
886 | d5970055 | Michael S. Tsirkin | hdev->started = true;
|
887 | d5970055 | Michael S. Tsirkin | |
888 | d5970055 | Michael S. Tsirkin | return 0; |
889 | 54dd9321 | Michael S. Tsirkin | fail_log:
|
890 | d5970055 | Michael S. Tsirkin | fail_vq:
|
891 | d5970055 | Michael S. Tsirkin | while (--i >= 0) { |
892 | d5970055 | Michael S. Tsirkin | vhost_virtqueue_cleanup(hdev, |
893 | d5970055 | Michael S. Tsirkin | vdev, |
894 | d5970055 | Michael S. Tsirkin | hdev->vqs + i, |
895 | d5970055 | Michael S. Tsirkin | i); |
896 | d5970055 | Michael S. Tsirkin | } |
897 | 54dd9321 | Michael S. Tsirkin | fail_mem:
|
898 | 54dd9321 | Michael S. Tsirkin | fail_features:
|
899 | 54dd9321 | Michael S. Tsirkin | vdev->binding->set_guest_notifiers(vdev->binding_opaque, false);
|
900 | 54dd9321 | Michael S. Tsirkin | fail_notifiers:
|
901 | d5970055 | Michael S. Tsirkin | fail:
|
902 | d5970055 | Michael S. Tsirkin | return r;
|
903 | d5970055 | Michael S. Tsirkin | } |
904 | d5970055 | Michael S. Tsirkin | |
905 | b0b3db79 | Michael S. Tsirkin | /* Host notifiers must be enabled at this point. */
|
906 | d5970055 | Michael S. Tsirkin | void vhost_dev_stop(struct vhost_dev *hdev, VirtIODevice *vdev) |
907 | d5970055 | Michael S. Tsirkin | { |
908 | 54dd9321 | Michael S. Tsirkin | int i, r;
|
909 | 54dd9321 | Michael S. Tsirkin | |
910 | d5970055 | Michael S. Tsirkin | for (i = 0; i < hdev->nvqs; ++i) { |
911 | d5970055 | Michael S. Tsirkin | vhost_virtqueue_cleanup(hdev, |
912 | d5970055 | Michael S. Tsirkin | vdev, |
913 | d5970055 | Michael S. Tsirkin | hdev->vqs + i, |
914 | d5970055 | Michael S. Tsirkin | i); |
915 | d5970055 | Michael S. Tsirkin | } |
916 | 2817b260 | Avi Kivity | for (i = 0; i < hdev->n_mem_sections; ++i) { |
917 | 2817b260 | Avi Kivity | vhost_sync_dirty_bitmap(hdev, &hdev->mem_sections[i], |
918 | 2817b260 | Avi Kivity | 0, (target_phys_addr_t)~0x0ull); |
919 | 2817b260 | Avi Kivity | } |
920 | 54dd9321 | Michael S. Tsirkin | r = vdev->binding->set_guest_notifiers(vdev->binding_opaque, false);
|
921 | 54dd9321 | Michael S. Tsirkin | if (r < 0) { |
922 | 54dd9321 | Michael S. Tsirkin | fprintf(stderr, "vhost guest notifier cleanup failed: %d\n", r);
|
923 | 54dd9321 | Michael S. Tsirkin | fflush(stderr); |
924 | 54dd9321 | Michael S. Tsirkin | } |
925 | 54dd9321 | Michael S. Tsirkin | assert (r >= 0);
|
926 | 54dd9321 | Michael S. Tsirkin | |
927 | d5970055 | Michael S. Tsirkin | hdev->started = false;
|
928 | 7267c094 | Anthony Liguori | g_free(hdev->log); |
929 | c1be973a | Michael S. Tsirkin | hdev->log = NULL;
|
930 | d5970055 | Michael S. Tsirkin | hdev->log_size = 0;
|
931 | d5970055 | Michael S. Tsirkin | } |